Article
Chemistry, Physical
Natalia Shevchenko, Elena Tomsik, Svetlana Laishevkina, Olga Iakobson, Galina Pankova
Summary: Polyelectrolyte microspheres synthesized by inverse emulsion polymerization exhibit high surface charge density and specific surface area, with the surface charge density being significantly higher than other methods. The structure of the surface layer of these microspheres can be comprehensively characterized using potentiometric titration, and their ion-exchange capacity is shown to be superior compared to other types of microspheres.
Article
Agricultural Engineering
Xujuan Huang, Zhengqing Ding, Weiyun Wang, Xinyan Yan, Yu Zhou, Zhaosheng Cai
Summary: RP-AESO porous materials prepared by emulsion template have uniform pore size distribution, hydrophobic properties, and oil absorption capacity. With increasing concentration of H-ESO-HEC, the pore density of RP-AESO porous materials increases and the average pore size decreases, leading to a decrease in compressive strength. Furthermore, these porous materials exhibit good reusability.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Materials Science, Multidisciplinary
Daniela Ap dos Santos, Adriano M. Oliveira, Natalia N. P. Cerize, Kelly C. Manhani, Douglas da S. Santos, Helena C. de Araujo, Silgia A. Costa, Sirlene M. Costa
Summary: This paper presents a process for producing particles loaded with the insect repellent IR3535 (R) using emulsion polymerization. The encapsulated material was characterized and showed potential application in textiles for protection against mosquito bites.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Construction & Building Technology
Lucie Zarybnicka, Jana Machotova, Petra Macova, Dita Machova, Alberto Viani
Summary: Polymer additives designed using emulsion polymerization can improve the performance of magnesium phosphate cements, increasing elastic behavior and toughness. The additives reduce the apparent porosity, promote phosphate crystallization, and retard the reaction.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fei Lin, Tobias O. Morgen, Stefan Mecking
Summary: P,O-chelated Ni(II) complexes typically result in low molecular weight polymers or oligomers due to competitive chain transfer events. However, bulky substituted phosphinophenolato Ni(II) complexes have shown the ability to polymerize in a living fashion without chain transfer, leading to high molecular weight polyethylenes in aqueous nanoparticle dispersions. The catalyst demonstrates stability and activity up to 70 degrees Celsius in water.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Food Science & Technology
Ronghan Wang, Jing Jing Wang, Xiaobing Guo, Yufeng Li, Yi Wu, Haiquan Liu, Yong Zhao
Summary: Succinylation of Antarctic krill proteins (AKPs) decreased particle size and hydrophobicity while increasing surface charge, enhancing solubility and emulsification. Succinylated AKPs effectively encapsulated curcumin, preparing emulsions resistant to stress of photothermal treatment, salt, and temperature variations, outperforming other protein-phenolic conjugates in protecting encapsulated curcumin. These findings suggest that succinylated AKPs have promising applications in the food industry.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Elham Yammine, Laurent Adumeau, Maher Abboud, Stephane Mornet, Michel Nakhl, Etienne Duguet
Summary: Fabrication of future materials through self-assembly of nano-building blocks programmed to generate specific lattices is a challenging goal of nanotechnology. A simple strategy to fabricate nanoparticles with multiple silica patches has been developed, showing potential applications in controlling the properties of particles through experimental parameters. Further developments include obtaining pure batches and optimizing the relative position of patches for repulsion figures.
Article
Chemistry, Multidisciplinary
Evelyn Y. Calvillo-Munoz, Araceli Vega-Paz, Diego Guzman-Lucero, Irina Lijanova, Octavio Olivares-Xometl, Natalya Likhanova
Summary: The synthesis of water-soluble terpolymers by free-radical inverse microemulsion and solution polymerization techniques was investigated. The results showed that the solution method yielded terpolymers with higher molecular weights at lower temperatures, while the inverse microemulsion method incorporated more (vinylbenzyl)trimethylammonium chloride into the terpolymer structure.
Article
Chemistry, Physical
Akira Nagasawa, Kanako Watanabe, Keishi Suga, Daisuke Nagao
Summary: By using soap-free emulsion polymerization and controlling the size and surface properties of PSt-based particles with ionic and nonionic comonomers, it is possible to develop new functional materials.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Biochemistry & Molecular Biology
Mariana Spinei, Mircea Oroian
Summary: Pectin was extracted from grape pomace using different extraction techniques. Microwave-assisted extraction showed the highest yield for Rara Neagra pectin, while conventional extraction had the highest yield for Feteasca Neagra pectin. The yield was correlated with various characteristics of the pectin, and the obtained pectin samples showed different properties compared to commercial pectin.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Katsuhiro Onita, Miku Onishi, Taro Omura, Takeshi Wakiya, Toyoko Suzuki, Hideto Minami
Summary: Monodisperse bio-based polymer particles were prepared through dispersion polymerization. The particle size can be controlled by changing the composition of the reaction medium or PVP concentration. 100% bio-based PMBL particles were also prepared using hydrolyzed PMBL as a colloidal stabilizer.
Article
Chemistry, Medicinal
Miroslava Nedyalkova, Giovanni Russo, Philip Loche, Marco Lattuada
Summary: Seeded emulsion polymerization is a well-known method for preparing polymer particles with controlled size and shape. The use of surfactants is critical in guaranteeing colloidal stability and influencing particle morphology. The presence or absence of surfactants can tune the morphology of the particles. Molecular dynamics simulations provide insights into the mechanism and behavior of surfactants during the polymerization process.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2023)
Article
Pharmacology & Pharmacy
Kohei Ogawa, Hidemasa Katsumi, Kazuyuki Takata, Daiki Nomura, Yasushi Moroto, Hideyuki Kitamura, Chise Takaki, Masaki Morishita, Akira Yamamoto
Summary: By optimizing PLA isomer and molecular weight of PLA-PEG NPs, it was found that SC-PEG NPs (12k-5k) had the most compact structure, highest PEG density, best drug loading content, and lowest surface adsorption. This makes them promising drug carriers for sustained and prolonged delivery of tamoxifen.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Food Science & Technology
Jiahui Xu, Taotao Dai, Jun Chen, Xuemei He, Xixiang Shuai, Chengmei Liu, Ti Li
Summary: The study reveals that three types of polymeric proanthocyanidins with different degrees of polymerization have significant effects on the physicochemical characteristics and digestion properties of potato starch. Lower degree of polymerization PPC shows stronger impacts on short-term retrogradation and gelling performance, while larger PPC molecules affect recrystallization and digestive characteristics to a greater extent.
Article
Polymer Science
Xin Guan, Jingjing Wei, Yufei Xia, To Ngai
Summary: In this study, a direct approach for the fabrication of noncovalent raspberry-shaped microgels was developed. This approach utilizes electrostatically driven heterocoagulation of binary microgels with complementary functional groups at the oil-water interface. The results show that the addition of hexanoic acid improves the hydrophobicity and interfacial activity of microgels, and raspberry-shaped microgels achieve high coverage on the droplet surface, resulting in an elastic interface and excellent stability of emulsions.
Article
Engineering, Environmental
Orietta Leon, Diana Soto, Alexandra Munoz-Bonilla, Marta Fernandez-Garcia
Summary: High-amylose maize starch was modified through graft copolymerization and covalent crosslinking, and evaluated as absorbent materials for release fertilizers. The study included extraction and precipitation of the starch, setting reaction parameters, characterization of the modified starches, and evaluation of their performance as release fertilizer systems through gravimetric and conductimetric analysis.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
Carolina Munoz-Nunez, Marta Fernandez-Garcia, Alexandra Munoz-Bonilla
Summary: Biobased nanomaterials, such as chitin and cellulose nanocrystals, are promising options for sustainable reinforcing materials due to their rod shape, dispersibility, outstanding surface properties, mechanical and barrier properties. Of particular interest, chitin nanocrystals have gained attention in the biomedical field for their biological properties and have been used in the development of bioactive composite films in biomedical and packaging systems.
Article
Polymer Science
Agueda Sonseca Olalla, Victor Hevilla Talavera, Daniel Lopez Garcia, Enrique Gimenez Torres, Marta Fernandez Garcia
Summary: The study demonstrates the successful synthesis of glycerol-derived macromers with different terminal structures using the catalytic specificity of Lipase B from Candida antarctica (CALB). The resulting macromers can be used as functional systems and building blocks for polymer synthesis after further reactions and modifications. Endgroup analysis using various spectroscopic techniques revealed the presence of hydroxyl, acid, and vinyl endgroups in the synthesized macromers.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
A. Chiloeches, R. Fernandez-Garcia, M. Fernandez-Garcia, A. Mariano, I Bigioni, A. Scotto d'Abusco, C. Echeverria, A. Munoz-Bonilla
Summary: In this study, antimicrobial fibers based on biodegradable polymers, poly(lactic acid) (PLA), and poly(butylene adipate-co-terephthalate) (PBAT) were prepared by electrospinning. A biodegradable/bio-based polyitaconate containing azoles groups (PTTI) was incorporated into the electrospinning formulations at 10 wt.%. The resulting fibers were functionalized with cationic azolium groups through N-alkylation for antibacterial activity. The efficacy of the fibers against bacteria was evaluated, showing a 4-Log reduction against S. aureus and 1.7-Log reduction against MRSA for quaternized PLA/PTTI fibers. The biocompatibility and bioactivity of the fibers were also assessed, indicating no cytotoxic effect but a cytostatic effect attributed to electrostatic interactions.
MACROMOLECULAR BIOSCIENCE
(2023)
Article
Chemistry, Physical
Zeineb Chorfi, Djouhra Aggoun, Selma Houchi, Zakia Messasma, Mostafa S. Abd El-Maksoud, Marta Fernandez-Garcia, Daniel Lopez, Chawki Bensouici, Ali Ourari, Yasmina Ouennoughi
Summary: The Ni(II) complex was successfully synthesized and characterized using various techniques such as elemental analysis, spectroscopic studies, thermal analysis, X-ray powder diffraction, and morphological measurements. The redox properties of the complex were investigated using cyclic voltammetry, and the structure was determined using density functional theory calculations. The complex exhibited a strong tyrosinase inhibitory activity in vitro.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Polymer Science
Maria Dolores Martin-Alonso, Valentina Salaris, Adrian Leones, Victor Hevilla, Alexandra Munoz-Bonilla, Coro Echeverria, Marta Fernandez-Garcia, Laura Peponi, Daniel Lopez
Summary: Functionalized silver nanoparticles were successfully incorporated into PLA solutions to produce multifunctional polymeric fibers using centrifugal force-spinning. The effects of nanoparticle incorporation and fiber preparation method on morphology, thermomechanical properties, biodisintegration, and antimicrobial behavior were investigated. The results showed that the best thermomechanical behavior was achieved with 1 wt% of nanoparticles, and the fibers exhibited antibacterial activity with a killing percentage between 65 and 90%. All samples were disintegrable under composting conditions. Additionally, a good thermally activated shape-memory effect was observed in fiber mats with 2 wt% of nanoparticles.
Article
Polymer Science
Tamara M. Diez-Rodriguez, Enrique Blazquez-Blazquez, Marta Fernandez-Garcia, Alexandra Munoz-Bonilla, Ernesto Perez, Maria L. Cerrada
Summary: Composites based on PLLA and MCM-41, either neat or modified with Ag, are prepared and show antimicrobial properties. The thermal stability, nucleation efficiency, and mechanical response of PLLA are influenced by MCM-41 nature and content. WAXS measurements reveal the formation of ordered ff crystals in the composites containing MCM-41@Ag. The composites with higher silica content exhibit higher MH values and remarkable antimicrobial features.
Article
Polymer Science
Victor Hevilla, Agueda Sonseca, Coro Echeverria, Alexandra Munoz-Bonilla, Marta Fernandez-Garcia
Summary: In this study, the formation of polymeric networks with potential antimicrobial character was described. The networks were based on an acrylate oligomer, poly(mannitol sebacate) (PMS), and an enzymatically synthesized methacrylic monomer with thiazole groups (MTA). Physicochemical characterization revealed that the incorporation of MTA into the networks and subsequent quaternization affected their mechanical behavior and surface wettability. The introduction of permanent cationic charges in the network surface gave antimicrobial activity to them, as confirmed by the analysis against Gram-positive and Gram-negative bacteria and red blood cells for antibacterial behavior and hemotoxicity, respectively.
Article
Materials Science, Multidisciplinary
Pedro Canamero, Marta Fernandez-Garcia, Jose Luis de la Fuente
Summary: In this study, the adhesion properties of poly(GMA-co-BA) copolymers were investigated on different metal surfaces using three different curing agents. The optimal curing conditions were determined using DSC analysis, and the adhesion performance was evaluated through single-lap shear tests. The results showed that the choice of curing agent influenced the adhesion strength and the optimal curing temperature, with the best performance observed using 2-CA as the curing agent with aluminum and iron substrates.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Polymer Science
Victor Hevilla, Agueda Sonseca, Marta Fernandez-Garcia
Summary: In this study, one-pot enzymatic synthesis procedures were developed to obtain poly(glycerol adipate) macromers with methacrylate end-functional groups. The obtained macromers showed a high fraction of methacrylate end groups and could be crosslinked under UV irradiation in a simple one-step procedure. This research provides a new approach to obtain methacrylate-functional linear macromers without the need for complex acrylation/methacrylation procedures.
Article
Nanoscience & Nanotechnology
Alberto Chiloeches, Jakub Zagora, Daniela Placha, Marcelo D. T. Torres, Cesar de la Fuente-Nunez, Fatima Lopez-Fabal, Yolanda Gil-Romero, Raquel Fernandez-Garcia, Marta Fernandez-Garcia, Coro Echeverria, Alexandra Munoz-Bonilla
Summary: This study investigated the synergistic antimicrobial effect of a cationic biobased polymer and the antimicrobial peptide temporin L. The results showed that the covalently conjugated polymer-peptide displayed an antagonistic effect, but incorporating both antimicrobial compounds into fibers improved antibacterial performance.
ACS APPLIED BIO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Djouhra Aggoun, Daniel Lopez, Marta Fernandez Garcia, Brahim Bouzerafa, Yasmina Ouennoughi, Abdeslam Bezza, Hamza Bezzi, Ali Ourari
Summary: This study investigated the decomposition kinetics of unmodified copolymer and nickel Schiff base complex through thermal analysis, revealing lower thermal stability for the nickel complex.
REVUE ROUMAINE DE CHIMIE
(2022)
